Slider for slide fasteners



' Jan. 7, 1936. G. SUNDBACK SLIDER FORSLIDE FASTENERS Filed 001'... 31, 1935 INVENTOR. Gideon S'undbac'li Patented Jan. 7, 1936 j UNIT-E I STATES PATENT OFFICE 2,0273% supra FOR suns FASTENERS Gideon Sundbaick, Meadville, Pa; assignor to Hookless Fastener Company, Meadville, Pa., a-corporation of Pennsylvania Application October 31, 1928, Serial No. 696,056 I I Claims. (01. 24-205) a My invention relates to sliders for slide fasteners. The expression slide fastener is used to designate fastenerscomprising rows of closely 15 looking deviceentirely automatic. According to my invention the advantages of the automatic action are secured and at the same timethe looking mechanism is made more certain in action, cheaper to manufacture, compact and neat in appearance.

In the accompanying drawing, I have shown for purposes of illustration, one embodiment which my invention may assume in practice. In the drawing:

having a slider made in accordance with my invention;

Fig.2 is a section on line 2-2 of Fig. i;

Fig. 3 is a longitudinal central section;

Fig. 4 is a perspective view of the locking block; Fig. 5 is a perspective view of a modified form of slider;

liig. 6 is a cross-section on line 6'-6 of Fig. 5; p v

Fig. 7 is a longitudinal section showing a still further modification.

The forms of slider illustrated in Figs. 1 to 4 he material which are now coming into use. The form of slider shown in Figs. 5 and 6 is intended for metallic sliders.

Referring to the drawing, the slide fastener illustrated comprises cooperating rows of fastener elements 8 secured to the beadededges of cloth tapes 9. The fastener elements are closely and uniformly spaced and are propded with suitable interlocking means which may have any of the known shapes. The slider lllcomprises a 50 channeled body member embracing the rows of P' fastener elements or more particularly, .it has upper andlower wings l1, l2 respectively, flanged at sides andconnected by all-shaped neck it. The upper wing oi. the slider is provided with a recess [4 on the inner side of the wing and Fig. l is a partial plan view of a slide fastener and 'l are intended for sliders'made of non-metalcommunicating with the slider channel l5, and opening through the upper surface of the slider by way of-the smaller aperture l6. In actual manufacture of the slider from non-metallic material, a hole may be'cut through the upper wing of the size desired for the recess l4, and a strip of material I! which has been pierced with the, smaller aperture Hi, can be attached to the flat upper surface of the slider wing. This attach ment can be easily accomplished when soluble non-metallic materials are used, simply by wetting the surfaces with solvent. If insoluble materials are used, glue or othersuitable cement would berequired. I v

A'locking block I8 is fitted loosely inthe recess 14 so as to be freely movable upwardly and downwardly. The block,car'ries on its end surface, teeth l9 arranged in staggered relation so as to engage in the spaces 20 between the fastener elements 8. In the upper position of the locking member, the fastener element engaging teeth I9 is'lifted out of the channel, and dojnot obstruct movement of the slider. In the lower position of the block, the teeth will automatically engage between the fastener elements and positively lock the slider against movement.

A pair of thin plate springs 2| are preferably mounted between the locking block and plate i1, so that the action of the locking member will be.

certain and entirely automatic. An upward extension 22 from the locking -member passes through the aperture l6 and forms a loop 23 into which is connected a slider operating member 24 of any appropriate design.

It is believed that the operation of the improved locking member will be apparent from the above description. When the operator desires to move. the slider, he simply :lifts the pull tab and as soon as he applies a pulling force the locking block will be lifted up out of engagement with 'the fastener elements and the slider is moved by force transmitted directly through .the' locking memberQ The action is the same no matterin which direction the slider is pulled. As soon as the operatormoves the slider to the desired posihe releases the pull 'tab and the locking block automatically springs intolocking engagement with the fastener elements and securely holds the slider in position. These functions are accomplished without any attention whatever from the user of the device. I

In Figs. 5 and .6 the locking block is formed from a sheet metalblan k'bent upon itself to provide the loop 25 at the bend to Whih the pull member can be attached. The locking teeth 25 are formed along'the edges of the blank and such edges are bent laterally as shown so as to provide the desired form of block. In forming the recess for the locking member, the material of the upper wing is deformed to provide the lips 21 overhanging the recess and serving to limit the movement of the slider operating member.

It is believed that the construction shown in Fig. 7 will be found highly desirable in the use of non-metallic sliders. A ribbon 28 is secured at both ends of the locking block in any suitable way. If non-metallic material is used, the attachment can be'quickly accomplished by the use of solvent. This forms a flexible pull track which can be folded against the surface of the locking block, thus avoiding all projections.

While I have shown and described in this application one embodiment which my invention may assume in practice, it will be understood that this embodiment is merely for the purposes of illustration and description and that various other forms may be devised within the scope of my invention as set forth in the appended claims.

What I claim as my invention is: 1. A slider for slide fasteners comprising a body member having upper and lower wings defining an interior channel for passage of fastener elements therein, means on the upper wing forming an internal recess, said recess having an opening therethrough to the exterior, the upper wall of said recess presenting an internal shoulder around said opening, a locking member mounted in said recess and having means attached thereto projecting through said opening,-

a spring between said locking member and internal shoulder, the projecting means serving as means for lifting the locking member out of ed in the channel of said slider and having means projecting through said opening, said floating block comprising a sheet metal member bent to provide a base, a loop, and locking teeth along the edges of the base, the base being positioned under said internal shoulder.

3. A slider for slide fasteners cf the class described comprising a channeled body member having an internal recess therein, a floating block mounted in said recess and movable therein into and out of locking position, means on the slider for retaining the floating block in said recess, and a flexible pull member attached at spaced points to. said floating block and projecting above the surface of the slider to serve as means for securing a slider pull tab and for automatically lifting the locking block to released position when the slider is operated by said pull tab.

4. A slider for slide fasteners of the class described comprising a channeled body member having a recess therein communicating with said channel, a floating block mounted in said recess and having locking teeth movable into and out of the slider channel for locking the slider against movement, and means on the slider for retaining said floating block in said recess, and

a slider operating member connecting directly to said floating block and adapted to transmit the slider operating force through said block.

5. A slider for slide fasteners comprising a body member having upper and lower wings defining a Y-shaped channel for passage of fastener elements therein, the upper wing having a recess on the inner side thereof, a floating block mounted in said recess and having teeth movable into and out of engagement with the fastener elements in said channel; the top wing having an opening therethrough communicating with said recess, means attached to said block and extending through said opening to form a loop, and an operating member connected to said loop for lifting said locking member upwardly to unlocking position and for transmitting a pulling force through said locking member to move said slider.

GIDEON SUNDBAC'K. 

